Analyse tridimensionnelle par méthode des éléments finis de la fixation des fractures de Bennett soit par brochage soit par fixateur externe - 02/02/13
Auteur correspondant. Department of Orthopedics, Tianjin TEDA Hospital, Number 65, Third Avenue, Tianjin TEDA, Tianjin 300457, China.Benvenuto su EM|consulte, il riferimento dei professionisti della salute.
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Summary |
Objective |
To analyze the mini-external fixation and percutaneous Kirschner (K)-wire internal fixation for the treatment of Bennett fracture by using finite-element analysis and to compare the biomechanical stability and postoperative impact of the two fixations on the fracture.
Methods |
Three-dimensional digital models of the first metacarpal bone, second metacarpal bone, and the trapezium were established using Mimics 10.01 software. A solid model and finite-element models were created and analyzed using ANSYS 10.0. The same load of 100N was exerted on both the mini-external fixator and the K-wire internal fixator for the treatment of Bennett fracture. Finally, the none-line solution was analyzed, and displacement nephograms were obtained.
Results |
The displacement nephograms of the distal and proximal fragments of the fracture obtained using the mini-external and K-wire models were established. The X/Y/Z (SUM)-component displacements of 15 nodes aligned with the articular surface fracture were obtained. The relative displacement of the distal and the proximal fragments of the fracture were calculated, and all digits of relative displacement were entered into SPSS 13.0 software. The difference between the X-component relative displacements was statistically significant. Moreover, the comparison of the Y-component, Z-component, and SUM-component relative displacements yielded statistical significance. The average relative displacement in the X-direction was 0.3214mm in the K-wire model.
Conclusion |
Mini-external fixation is more effective than K-wire internal fixation for secure Bennett fracture stability. Both fixations have similar effects on postoperative traumatic arthritis and postoperative hand functions.
Level of evidence |
1. Biomechanical studies.
Il testo completo di questo articolo è disponibile in PDF.Keywords : Bennett fracture, Fracture of the base of the first metacarpal, Finite element analysis, Mini-external fixation, K-wire internal fixation, Biomechanics, Finite element models
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 | Cet article peut être consulté in extenso dans la version anglaise de la revue Orthopaedics & Traumatology: Surgery & Research sur Science Direct (www.sciencedirect.com/) en utilisant le DOI ci-dessus. |
Vol 99 - N° 1
P. 22-23 - febbraio 2013 Ritorno al numero
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